BottomMargin Element (RDL)
Specifies the width of the bottom margin of the report.
The string for the BottomMargin element must contain a number (with a period character used as an optional decimal separator). The number must be followed by a designator for a CSS length unit such as cm, mm, in, pt, or pc. A space between the number and the designator is optional. For more information about size designators, see "CSS Length Units Reference" at msdn.microsoft.com.
The maximum value for BottomMargin is 160 inches. The minimum value is 0 inches.